Search found 153 matches

by peskanov
Tue, 10 Sep 2013, 00:46
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

T2, it's great to see your a planing a high revs rewind. I hope you will share some part of the process with us if you go ahead. I considered testing the motor in a way similar to the one you are proposing. In my case, I don't need a motor brake as I have access to an old electromagnetic dyno. Looks...
by peskanov
Sun, 08 Sep 2013, 06:34
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

BigMouse, that's a neat idea. Our motor is already well dried under the sun, but it could be a good idea to test on the next one (I guess there will be another one at some point, rewinding motors is nasty but also strangely addictive). electricity4cars, thank for the encouragement. Speaking about mo...
by peskanov
Tue, 03 Sep 2013, 12:48
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Hey, the rubber mallet part of the process rules! It's satisfying to hit those damned copper wires, after suffering so much inserting them http://forums.aeva.asn.au/smileys/smiley4.gif . Btw, I bought mine in a bazaar, price 2 euros. Thanks for the tip Weber, we will try it for sure. BigMouse, just ...
by peskanov
Mon, 02 Sep 2013, 13:25
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Hi Adverse effects, in the pictures looks much nicer than it is, we are learning an it shows when you a get close view. Thanks anyway! Well, I am happy to say the motor is alive! Today we solved the terminals problem and tested it without load. About the terminals, this task is a bit harder than it ...
by peskanov
Sun, 01 Sep 2013, 14:23
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

After packing the coils, we tested the circuits for shorts, bad insulation, etc...Everything was OK but you cannot test if each phase has the same resistance, as winding for low V/Hz makes resistance so small a normal multimeter will not be able to read it correctly. Now, the varnishing. That's easi...
by peskanov
Sun, 01 Sep 2013, 14:11
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Update time, we are reaching the finish line, and at this point I don't even care if it works or not! I just want to see the damned thing done! http://forums.aeva.asn.au/smileys/smiley4.gif Some pics of the coild heads packing. Here we are using the nylon thread. https://lh5.googleusercontent.com/-t...
by peskanov
Wed, 28 Aug 2013, 14:55
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Johny & Weber, thanks for the encouragement, it really helps. Johny, is there any video or thread where I can find about that (I mean Ian's motor)? GlanDeas, you are an elegant spambot and your creator is an stylish coder, but some moderator should delete you from this board…. BigMouse, yep, you ar...
by peskanov
Tue, 27 Aug 2013, 19:26
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Here we have the fist phase built: https://lh6.googleusercontent.com/-SVAYoSYdZ5I/UhvIUBeOSeI/AAAAAAAAAZQ/KyX7YyZJwvc/s640/phase_one_done.jpg The insulated parts are the "bridges" that can be seen on the diagram. All the wire is in one piece, not cuts/connections. I think each phase takes abut 6-8 h...
by peskanov
Tue, 27 Aug 2013, 19:11
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Rewinding update, yesterday we finished winding the coils. Basically, we followed Ivan's method (with a different layout) as all our experiments proved unproductive. I have a few tips to share for anybody trying to do the same: - Good lighting. The stator interior is shadowed easily, and you will be...
by peskanov
Tue, 27 Aug 2013, 18:41
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Bigmouse, I was referring to this: http://ivanbennett.com/forum/index.php?topic=57.0 I always thought this was similar to the tech applied to DC motors, where armature current is purposefully reduced in order to get more speed. In an AC motor you should be able to reduce armature current reducing th...
by peskanov
Mon, 26 Aug 2013, 02:08
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

T2, Well, perhaps the motor is trying to tell you something. That this new winding has made the motor too powerful for the controller. If you go back a few posts you will find Richo and myself, initially recommending that you start with something smaller, like perhaps 5.5Kw ? You, however, insisted ...
by peskanov
Mon, 26 Aug 2013, 01:45
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Weber, as T2 said, this wire layout is a 4 poles one. In a fact it is the layout the motor had from origin, I wanted to rebuilt it with lower voltage. As I found it too difficult, I moved to lap winding. About optimizing torque: motor can be cheap (at least if you rewind a motor successfully) but co...
by peskanov
Fri, 23 Aug 2013, 08:03
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Johnny, I was trying to keep the method of professional rewinders I know, keeping exactly the same total copper section. But this is not so important when you use a Curtis, as it does not care about the "nominal voltage" of the motor at all. But I have seen Ivan puts as many copper as it fits in the...
by peskanov
Thu, 22 Aug 2013, 05:40
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Thanks for the links, Ive been checking Ivan's work, but somehow I didn't read the one Johnny posted. There is something I don't understand about Ivan rewinds, he seems to work with half the wires I am dealing with...and I am using same gauge (18, 1mm) and have to fill more slots (48 vs 36). Maybe h...
by peskanov
Wed, 21 Aug 2013, 05:26
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Another day working on the motor... We have discarded the insulation of heads using tubes. Once you get a group of coils done, you must mold them in order to make some space for the next ones. Space is scarce, specially if you a noobie (like me), so I discarded that idea. Ok, this time we tried thre...
by peskanov
Mon, 19 Aug 2013, 23:59
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Yep, that problem is in my mind. I have seen coil head insulated with plastic and tied strong before, so I guess air bubbles are not much of a problem. However, I was thinking about making some cuts in the tubes (after winding) to allow varnishing. Another way would be to insert 2 tubes instead of o...
by peskanov
Mon, 19 Aug 2013, 12:16
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Bluefang, in case you are still reading this thread: we counted the layers despite the red spray, it's 16 in 1cm. Report from our 1st day of rewind. As the conductor is very thick (28 wires of 1mm), we thought about minimizing internal connections. The best way is to prepare as many coils as possibl...
by peskanov
Mon, 19 Aug 2013, 11:47
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

T2, I see you always write about Star configuration instead of usual Delta one. What you propose (1 turn in Star, 28VAC) is pretty similar to what I am trying (2 turn in Delta, 32VAC). Using your config (1 turn) in delta would provide even lower voltage, 16VAC, moving the max. power point to the 600...
by peskanov
Sat, 17 Aug 2013, 06:05
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Nope, it had 2 thick plastic discs. One of them was fragmented.

I saw this insulating spray on the shop and it was cheap. As Ivan Bennet and others are using it, I decided to buy one. I think it's a novelty in the world of rewinders.
by peskanov
Fri, 16 Aug 2013, 12:38
Forum: Electric motors and controllers
Topic: Help to identify this motor?
Replies: 3
Views: 1168

Help to identify this motor?

As a noobie rewinder, here is my opinion for what is worth. I don't have my book of wiring schemes here, but I think its winded as a 4 pole. Each group of 3 slots share the same polarity; as there are 36 slots, 36/3=12 poles/ 3 phases=4 poles. If you know the n. poles, the material of the motor (alu...
by peskanov
Fri, 16 Aug 2013, 11:55
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Yesterday we finished cleaning the motor. First we started with the top & bottom of the stator: https://lh3.googleusercontent.com/-rLnbj-Bf9kk/Ug0hTY9Mt0I/AAAAAAAAAVs/gayMnahCzyo/s512/brush.jpg https://lh6.googleusercontent.com/-wNzfxyWA7tQ/Ug0hTfxnI8I/AAAAAAAAAVg/gqbgJIVj41A/s480/brushed.jpg Then w...
by peskanov
Fri, 16 Aug 2013, 11:44
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Time for some progress report. My Curtis 1238 came from customs and we checked it with our "testing mule". It ran perfectly; 2 advices when setting a Curtis: - Wire the interlock thingie, it will not work without it. Disabling the controller option is not enough. - If it works, but slow and vibratin...
by peskanov
Fri, 16 Aug 2013, 11:13
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

T2, The 5.5KW motor rewind is something I am still pondering, the info I posted referred to the 9KW one. I am rewinding that one first, if it works without much vibration (I don't really know if the squirrel cage is broken) I will test it on the dyno. This motor is 230V/400V, 50Hz. It had 56 wires i...
by peskanov
Mon, 22 Jul 2013, 13:11
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

jonescg, I think these windings work a bit different from usual. My guess: there must be 12 poles, 4 for each phase. If you accept slots 1-4 as one pole, and slots 13-16 as other pole (even when all wires members of the same coil group) I think all makes sense. In this conf., each coil group actuall...
by peskanov
Mon, 22 Jul 2013, 03:55
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24440

Junkyard motors parade

Some news about my latest findings: - One of the rewinders told me the small cracks in the body of the rotor were probably caused by squirrel cage crack and arcing. - Another one told me no shop can properly diagnose an squirrel cage, no matter what they say. His says the only way to check the cage ...